In this study,we employed a non-invasive approach based on the collisional radiative(CR)model and optical emission spectroscopy(OES)measurements for the characterization of gas tungsten arc welding(GTAW)discharge and ...In this study,we employed a non-invasive approach based on the collisional radiative(CR)model and optical emission spectroscopy(OES)measurements for the characterization of gas tungsten arc welding(GTAW)discharge and quantification of Zn-induced porosity during the GTAW process of Fe–Al joints.The OES measurements were recorded as a function of weld current,welding speed,and input waveform.The OES measurements revealed significant line emissions from Zn-I in 460–640 nm and Ar-I in 680–800 nm wavelength ranges in all experimental settings.The OES coupled CR model approach for Zn-I line emission enabled the simultaneous determination of both essential discharge parameters i.e.electron temperature and electron density.Further,these predictions were used to estimate the Zn-induced porosity using OES-actinometry on Zn-I emission lines using Ar as actinometer gas.The OES-actinometry results were in good agreement with porosity data derived from an independent approach,i.e.x-ray radiography images.The current study shows that OES-based techniques can provide an efficient route for real-time monitoring of weld quality and estimate porosity during the GTAW process of dissimilar metal joints.展开更多
对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl...对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl KF钎剂,经320℃加热和15min保温,对锌铝合金进行炉中钎焊,其钎焊接头抗拉强度为116.3MPa,抗剪强度为96MPa;接头中生成了新相,存在着(220)Mg2Cu6Al5//(010)Cd的相结构。展开更多
基金the Ministry of Human Resources and Development(MHRD),Government of India,for providing HTRA fellowshipthe support by the SERB,India,for listed Grants(Nos.CRG/2018/000419,CVD/2020/000458,and SB/S2/RJN-093/2015)+1 种基金Core Research Grant,India(No.CRG/2020/005089)IIT Tirupati,India(No.MEE/18-19/008/NFSG/DEGA)。
文摘In this study,we employed a non-invasive approach based on the collisional radiative(CR)model and optical emission spectroscopy(OES)measurements for the characterization of gas tungsten arc welding(GTAW)discharge and quantification of Zn-induced porosity during the GTAW process of Fe–Al joints.The OES measurements were recorded as a function of weld current,welding speed,and input waveform.The OES measurements revealed significant line emissions from Zn-I in 460–640 nm and Ar-I in 680–800 nm wavelength ranges in all experimental settings.The OES coupled CR model approach for Zn-I line emission enabled the simultaneous determination of both essential discharge parameters i.e.electron temperature and electron density.Further,these predictions were used to estimate the Zn-induced porosity using OES-actinometry on Zn-I emission lines using Ar as actinometer gas.The OES-actinometry results were in good agreement with porosity data derived from an independent approach,i.e.x-ray radiography images.The current study shows that OES-based techniques can provide an efficient route for real-time monitoring of weld quality and estimate porosity during the GTAW process of dissimilar metal joints.
文摘对锌铝合金的钎焊性进行了分析,对ZnCl2 NH4Cl KF钎剂的去膜机理以及Cd Sn Zn钎料各组分的作用进行了阐述;分析了锌铝合金钎焊接头的力学性能、组织和成分;并对钎焊接头进行了无损检测。试验结果表明:用自制的Cd Sn Zn钎料和ZnCl2 NH4Cl KF钎剂,经320℃加热和15min保温,对锌铝合金进行炉中钎焊,其钎焊接头抗拉强度为116.3MPa,抗剪强度为96MPa;接头中生成了新相,存在着(220)Mg2Cu6Al5//(010)Cd的相结构。
